One unusual way to tell if a GM vehicle uses the Global B electronic architecture is to listen to the warning chimes it makes.
Our video shows the chimes sounding in a 2019 Chevy Corvette C7, which is not a Global B vehicle, and a 2021 Chevy Tahoe, which is. In the Corvette, each chime is a single note, repeated at short intervals. The sound is functional and clear, but little more than that.
In the Tahoe, the chimes sound more rapidly. Each consists of two notes, the first acting as a grace note to the second. The second note is a major third higher in pitch than the first, giving a friendlier and more pleasing sound – if any musical interval can be said to have a smile on its face, it’s the rising major third. This eliminates any extra sense of insistence which might have been caused by the shorter time gap between each chime.
The extra computing power required to produce the later chimes is vanishingly small compared with the superiority that Global B has over the earlier Global A digital platform. For example, its processing power is five times higher, at 4.5 terabytes per hour.
Known publicly as Vehicle Intelligence Platform, Global B allows GM to deliver more modern vehicle powertrains (like electric vehicles), enhanced safety systems, new levels of vehicle cybersecurity, new infotainment features and ever-improving semi-autonomous driver assistance, such as the Super Cruise system already available on several Cadillac models, and the upcoming Ultra Cruise. Another advantage of Global B is that it allows more rapid communication between the vehicle and outside sources, making it possible for over- the-air software updates.
In addition to the Tahoe, GM vehicles currently using Global B are the:
- 2020 Chevy Corvette
- 2021 Cadillac CT4
- 2021 Cadillac CT5
- 2021 Cadillac Escalade / Escalade ESV
- 2021 Chevy Suburban
- 2021 GMC Yukon and 2021 GMC Yukon XL
Global B will be adopted by the 2022 Chevy Silverado 1500 pickup truck and its corporate cousin, the 2022 GMC Sierra 1500, as part of the upcoming refresh (mid-cycle enhancement / MCE) for those vehicles.
All of the upcoming GM electric vehicles built on the BEV3 platform and using Ultium battery and drive technology are also expected to use the Global B architecture, so it’s safe to assume that their chimes will be similar to (if not the same as) those used for the Tahoe. This does not apply to the all-electric 2022 Chevy Bolt EUV or 2022 Chevy Bolt EV, the former of which will have an earlier form of Super Cruise (without the Automated Lane Change feature) but will not use the Global B electric vehicle platform platform.